The Xi-A Flying Concept; Accoustical Considerations - Electro-Voice Xi-A Series Manual

overhead. To attach the double-stud, swivel-ring fittings (as shown in Figure 2.4a) to the
enclosure's rigging track, push in the spring-loaded safety-locking pin and lift the outer locking ring
over the pin. Continue to lift the locking ring until the two studs on the bottom of the fitting are fully
exposed. Insert the two round feet of the studs into the round cutouts in the track and slide the
fitting to the desired position. Center the main body of the fitting over one of the track cutouts, with
the feet located on either side (i.e., with the stud feet positioned directly under the teeth of the
track). Release the outer locking ring. The round protrusion on the bottom of the fitting should lock
into the round cutout in the track with the locking ring retracting to its normal position, allowing the
safety-locking pin to reappear and extend over the locking ring. If the fitting does not lock into the
track, nudge it along the track and wiggle as necessary until it settles into position. If the outer
locking ring does not fully retract, push the ring towards the track until the safety pin reappears
and extends over the locking ring. When locked, the fitting will be immovable in the track and the
locking ring of the fitting may not be lifted. To remove the fitting, reverse the procedure.
ALWAYS CHECK TO MAKE SURE THAT THE FITTING IS SECURELY LOCKED
INTO THE TRACK, AND THAT THE SAFETY PIN IS EXTENDED OVER THE
LOCKING RING BEFORE LIFTING ANY LOUDSPEAKER ENCLOSURE
OVERHEAD.
To attach the single-stud, swivel-ring fittings (as shown in Figure 2.4b) to the enclosure's rigging
track, remove the safety-locking pin and lift the fitting body over the hole for the locking pin.
Continue to lift the fitting body until the stud on the bottom of the fitting is fully exposed. Insert the
round foot of the stud into a round cutout in the track and slide the fitting to the desired position.
Center the main body of the fitting over one of the track teeth (i.e. with the stud foot positioned
directly under one tooth of the track). Release the fitting body. The body of the fitting should lock
into the round cutouts in the track with the fitting body retracting to its normal position, allowing the
hole for the safety-locking pin to reappear. If the fitting does not lock into the track, nudge it along
the track and wiggle as necessary until it settles into position. If the fitting body does not fully
retract, push the body towards the track until the hole for the safety pin reappears. Install the
safety-locking pin into the hole in the shaft. When locked, the fitting will be immovable in the track
and the body of the fitting may not be lifted. To remove the fitting, reverse the procedure.
ALWAYS CHECK TO MAKE SURE THAT THE FITTING IS SECURELY LOCKED
INTO THE TRACK, AND THAT THE SAFETY PIN IS INSTALLED BEFORE
LIFTING ANY LOUDSPEAKER ENCLOSURE OVERHEAD.

2.3 The Xi-A Flying Concept

2.3.1 Acoustical Considerations
The Xi-A systems lend themselves to easy array construction. All of the Xi-A loudspeaker systems
use the same L-track rigging hardware on the enclosures, and may be oriented with the rigging
track either on the top and bottom of the cabinets or on the sides of the cabinets. All of the full-
range Xi-A systems have trapezoidal enclosures, enabling high-density, point-source arrays. The
horns in many of the full-range Xi-A systems are rotatable, allowing the cabinets to be oriented for
optimal physical installation and the coverage pattern to be oriented for optimal acoustic
performance. Many of the Xi-A systems have the same dimensions, facilitating ease of rigging
and a consistent cosmetic appearance. With grilles in place, the Xi-A subwoofer systems are
indistinguishable from the large Xi-A full-range systems, allowing the option of either flying the
subwoofers or stacking them on the floor, or even a combination of the two, while still preserving
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ELECTRO-VOICE Xi-A Rigging Manual